In the month of June, the Marquis Marialva was received at Paris as ambassador of Portugal and Brazil, and shortly afterwards the way having been prepared by an inferior minister, he went to Vienna, to negotiate a marriage between Don Pedro de Alcantara, Prince of Portugal and Brazil, and the Archduchess Maria Leopoldina, which was happily effected. On the 28th of November, she was privately contracted at Vienna to the prince. On the 17th of February following, the contract was made public, and on the 13th of May she was married by proxy, the Marquis Marialva standing for Don Pedro; but it was not until the 11th of November that she arrived at Rio. The line of battle ship Joam VI. had been sent along with two frigates for her to Trieste, the voyage was performed without accident, and the person the most important to the hopes and happiness of Brazil, was welcomed with enthusiasm by all classes of people. In the autumn preceding, two of the Infantas of Portugal had been married to Ferdinand the 7th of Spain, and his brother the Infant Don Carlos. But the frontier of Brazil to the southward now began to feel the effect of those disturbances which had long agitated Spanish South America. The chief Artigas showed a disposition to encroach on the Portuguese line, and, therefore, a corps of volunteers had been formed for the purposes of observation, and the Porte da Santa Theresa had been occupied in order to check the motions of that active leader: during the autumn of 1816, several skirmishes took place, but the arts of negotiation as well as of war were resorted to, and on the 19th of January, 1817, the keys of Montevideo were delivered up to the Portuguese general Lecor, by which the long-wished-for command of the eastern bank of the Plata was obtained.